class School():
    name: str = None                # 学校名
    grades = None                   # 年级列表
    pass

class Grade():
    name: str = None                # 年级名
    classes = None                  # 班级列表
    pass

class Class():
    name: str = None                # 班级名
    subjects = None                 # 所开科目
    pass

class Subject():
    name: str = None                # 科目名
    hours_per_week = None           # 每周多少节课
    pass

class Teacher():
    name:str = None                 # 姓名
    sex:bool = None                 # 性别
    id:str = None                   # 唯一ID
    grade = []                      # 年级,有可能有多上年级高一,高二
    subject = []                    # 科目, 有可能可教多个科目
    classes = []                    # 所教班级 
    pass

class Schedule():
    pass





